Lock.



E. M. MILLER.

LOCK.

APPLICATION FILED MAY 4. 1914.

l ,2]; 2,31 Patented Jan. 16, 1917.

areniom' (h w/w LOCK.

Specification of Letters Patent.

Patented J an. 16, 191?.

Application filed May 4, 1914. Serial No. 836,133.

I hereby declare the following to be afull,

clear, and exact description of the invention,

such as will enable others skilled in the art to which it pertains tomake and use the same.

This invention relates to new and useful improvements in combinationlocks, and particularly to the type of locks known as box or chestlooks.

The object of this invention is to pro-' vide a lock of this characterwhich will be very strong and compact and which can be cheaplymanufactured.

Vith this object in view and to the end of securing other advantageswhich will hereinafter appear, this invention consists in certainfeatures of construction and co'mbination of parts, illustrated in theaccompanying drawings, described in the specification and pointed out inthe claims.

In the accompanying drawings, Figure 1 is a view of my improved chestlock, with the back of the lock casing removed and showing the lockmembers in engagement. Fig. 2 is a section on line 2-2,'Fig. 1.

Fig. 3 is a section on line 3-3, Fig. 2. F ig.'

4 is a section similar to Fig. 2 showing the lock members separated.Fig. 5 is an exterior view of a portion of the lock casing.

Referring tothe drawings, it will be seen that the lock casing is formedin two sections, one of which sections comprises the back plate 6, andthe front end of the casing, shown at 7, and the other section comprisesthe front plate '8, the two-sides 9 and the rear end 10. The twosections of the casing may be secured together in any preferred manner,and, as 9 and the rear end 10. are provided with tongues 12 which areadapted to extend through slots 13 formed in the back plate 6. In eachof the sides 9 near the front end of the casing are formed recesses,shown at 14c, and the bottom wall of each recess 14 isinclinedlongitudinally. A locking bar 15 extends from side to side ofthe look casing near the front end thereof and the ends of said bar 15are seated on the inclined bottom walls of the recesses 1d. The

shown, the sidessaid bar is therefore supported at an angle to the frontplate 8, but is free to be swung up or away from said plate so as toassume a position approximately parallel with said front plate 8. Thesaid bar 15 is provided with a lip 16 which is arranged at an angle tothe said bar. To the front plate 8 is secured a small plate 17 which isprovided with slotted flanges 18 which form guides for a slidable bar 19which is arranged at a right angle to the locking bar 15. The forwardend of the bar 19 extends under the said locking bar 15 and is providedwith a lug 20 having a beveled face adapted to come in contact with thelip 16 on said locking bar 15. Between the opposite end of said bar 19and the rear end of the casing is arranged a coiled spring 21 whichnormally holds the said bar 19 in its forward position. On the'end ofsaid bar 19 adjacent to the spring 21 is arranged a lug or projection22. i The front plate 8 is countersunk at its center, as at 23, and isprovided with openings 24. A sleeve or barrel 25 is secured to the frontplate by means of tongues 26 which extend into the openings 24: so thatthe said barrel projects forwardly from the outer face of the saidplate. The combination disk is'shown at 28 and this disk has a hub 29wiich is journaled in an opening 27 in the front plate 8. The saidcombination disk 28 is secured on the inner end of a spindle 30 whichextends through the said barrel 25 and on the outer end of said spindleis secured an operating knob 32. On the face of said disk are arranged aseries of cams or ridges 34 and a stop forming projection 35. A lever 36is pivotally mounted at one end at one side of the disk 28 and the saidlever 36 extends across the face of said disk and its free end isarranged to engage with'the lug 22 on the bar 19. The said lever 36carries a pin 37 which extends toward the face of the disk 28 and isadapted to be engaged by the ridges 34'; on the said disk; The stop 35on the said disk is so arranged that when the disk is rotated in onedirection the said stop 35 will come in contact with'the pin 37 on thesaid lever 36 and the rotation of the disk will be stopped and thisposition of the disk is the starting position for any given combination.The ridges 34 are so arranged that when the disk is turned back andfortha whole or part of a revolution a number of times according to apredetermined plan the pin 87 will travel from ridge to ridge constantlymoving farther from the center of the disk and thereby causing the freeend of the lever 36 to travel toward the rear end of the casing and comein con tact with the lug 22- on the said bar 19, thereby shoving backthe said bar 19 and bringing the lug 20 on the front of the said bar 19in contact with the downwardly extending lip 16 on the locking bar 15which causes said bar 15 to swing up. Around the perimeter of the disk28- are formed notches 38 and at the side of the disk is arranged aspring 39, one end of which presses against the perimeter of the saiddisk. When the disk is turned, the end of the spring passing over thenotches 38 produces a clicking sound and also causes a slightinterruption to the regular movement of the disk and thereby indicatesboth to the sense of hearing and to the touch what portion of arevolution the disk has been turned through.

The member of the lock which is secured to the lid of the trunk consistsof a plate 10 which is adapted to be secured to the lid of the box orchest and is provided with hookshaped members 41. These hookshapedmembers are arranged to enter the lock-casing through openings 42 formedin the front end of the casing and extend between the locking bar 15 andthe front plate 8, and the hooked ends of said members 41 are adapted totilt up the inner edge of the locking bar when they pass under the same,and after the hooked ends have passed under the said bar 15 the barmoves down again and engages with said hooks. A spring 14 is secured tothe back plate 6 and is adapted to hold the said bar 15 yieldingly onthe inclined walls of the said recess. A spring 45 is also secured tothe back plate 6 and bears against the lever 36.

The operation of the lock is as follows When the lid of the box isclosed the hook members 11 enter the lock casing behind the locking bar15 and as the hook members enter the casing they swing back said lockingbar while passing under it and the locking bar then swings down andengages with the hooks, thereby securing the hooks in the lock casing.Now, when it is desired to open the box, the operating knob 32 'isturned back and forth so as to turn the combination disk through suchportions of a revolution as may be necessary to operate the lever 36 andcause the same to travel or swing toward the rear end of the casing andengage with the lug 22 on the bar 19. When the lever engages the saidlug the said bar 19 is drawn back and as the bar 19 moves back the lug20 on the end thereof engages with the lip 16 on the locking bar 15causing the said locking bar to swing up and thereby release the hookmembers so that the hooks can be disengaged from the lock casing.

What I claim is 1. In a chest lock, the combination with a plate havinga hook shaped member rigidly secured thereto, of a lock casing providedwith an opening for receiving said hook shaped member, a horizontallyarranged locking bar supported in said casing and capable of rocking onits supports, said locking bar being adapted to engage with said hookshaped member, a bar mounted in said casing and free to slide in itsmountings, one end of said slidable bar being arranged to engage withsaid locking bar and rock it out p of engagement with said hook shapedmember, means for resiliently holding said slidable bar against movementand means for actuating said bar.

2. In a chest lock, the combination with a plate having a hook shapedmember of a casing provided with an opening for receiving said hookshaped member, a locking bar arranged in said casing and capable ofrocking on its supports, said locking bar having an edge adapted toengage with said hook shaped member, means for resiliently holding saidlocking bar in engagement with said hook shaped member, a bar slidablymounted in said casing and having one end adapted to engage with saidlocking bar and rock said bar out of engagement with the said hookshaped member when the said slidable bar is moved longitudinally andmeans for actuating said bar.

3. In a chest lock, the combination with a plate having hook shapedmembers, of a cas ing provided with an opening for receiving said hookshaped members, a horizontally arranged locking bar supported in saidcasing and capable of rocking on its supports, said locking bar havingone edge adapted to engage with said hook-shaped members and havlng atongue arranged at an angle to I- said bar, a bar slidably mounted insaid oas- 7 ing and provided with a lug arranged to extend under saidlocking bar and engage with the tongue thereon and means for actuatingsaid slidable bar to bring it into engagement with said tongue on saidlocking ar.

4;. In a chest lock, the combination with a plate having hook shapedmembers rigidly secured thereto, of a casing provided with openings forreceiving said hook shaped members, said casing having recesses in thesides thereof, the bottom walls of said recesses being inclined, alocking bar arranged in said casing and extending horizontally from sideto side thereof and having its ends resting on the inclined wall of saidrecesses, one edge of said locking bar being adapted to engage with thehook shaped members of the plate, said locking bar being also providedwith a tongue arranged at an angle In testimony whereof, I sign theforegothereto, a bar slidably mounted in said casing specification, inthe presence of two 10 inlg ind pravidercl1 at 0(I11e1 end with a lugWitnesses.

w ic exten s un er sai ocking ar and is adapted to engage with thetongue on said EDWARD MILLER locking bar and means for actuating saidWitnesses:

slidable bar to bring it into engagement with C. M. DAVIS,

said locking bar. J. B. MILLER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

